Best Tm400x4ad Deals of Nov 2026

Updated November 9, 2026Our site contains affiliate links for which we may be compensated.
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Rockford Fosgate

$76 Savings

Rockford Fosgate Power TM400X4ad 400-Watt 4-Channel Marine Amplifier | Class AD, Element Ready: Built to Stand Up to the Marine Environment

Our compact (1.6” x 4.3” x 8.3”) Power Marine TM400X4ad 4-channel amplifier produces more power per square inch than any other model we make with 400 Watts of POWER
Proprietary Constant Power amps are the most powerful on the market, delivering up to 25% more power across all impedance loads (100 Watts x 4 @ 4-Ohm or 100 Watts x 4 @ 2-Ohm or 200 Watts x 2 @ 4-Ohm Bridged)
Built on Rockford Fosgate’s proprietary Class-AD technology and Element Ready protecting against dust, UV, and corrosion, making it perfect for motorsport and marine applications
High-level auto turn-on, CLEAN circuit input/output clip detection, On-board Punch EQ with +18dB boost @ 45Hz and 12dB/octave Butterworth crossover make TM400X4ad an impressive POWER house
Famous Rockford Fosgate build quality ensures that the TM400X4ad will handle everything you throw at it! Full 2-year parts and labor warranty
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on Amazon.com
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Rockford Fosgate

30% Off

Rockford Fosgate Power T400X4ad 400 Watt 4-Channel Amplifier | Class-AD with Constant Power

Our ultra-compact (1.6” x 4.3” x 8.3”) Power T400X4ad 4-channel amplifier produces more power per square inch than any other model we make with 400 Watts of POWER
Proprietary Constant Power amps are the most powerful on the market, delivering up to 25% more power across all impedance loads (100 Watts x 4 @ 4-Ohm or 100 Watts x 4 @ 2-Ohm or 200 Watts x 2 @ 4-Ohm Bridged)
Proprietary Class-AD technology, featuring Constant Power to produce the same output at both 4-Ohm and 2-Ohm, making it perfect for hybrid, electric, small cars, trucks, motorcycles, and side-by-side UTVs
High-level auto turn-on, CLEAN circuit input/output clip detection, On-board Punch EQ with +18dB boost @ 45Hz and 12dB/octave Butterworth crossover make T400X4ad an impressive POWER house
Famous Rockford Fosgate build quality ensures that the T400X4ad will handle everything you throw at it! Full 2-year parts and labor warranty
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on Amazon.com
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Rockford Fosgate

Rockford Fosgate Punch PBR400X4D 400-Watt 4-Channel Amplifier | Class-BR, Ultra Compact Chassis, Easy on Vehicle Electrical System

Our compact (1.5" x 4.25" x 6.75") PBR400X4D is small enough to fit in just about any application but packs a Punch with 400 Watts RMS of power!
Versatile design can be used in either 2 or 4 channel configurations (RMS Power Output: 50 Watts x 4 @ 4-Ohm or 100 Watts x 4 @ 2-Ohm or 200 Watts x 2 @ 4-Ohm Bridged)
Ultra efficient Class D full range design produces maximum power with minimal strain on the vehicle's electrical system. A great choice for both mobile installs as well as motorcycles and recreational vehicles
High level inputs with auto-on feature as well as differential RCA inputs along with selectable fixed 12dbB/Octave Butterworth Crossovers make the PBR400X4D amp compatible with just about any installation
Famous Rockford Fosgate build quality insures that the PBR400X4D will handle everything you throw at it! Full 1-year parts and labor warranty
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Rockford Fosgate

Rockford Fosgate M5-800X4 800-Watt 4-Channel Marine Amplifier | Class-AD with Dynamic Power, IPX6 and Element Ready: Protected Against the Harsh Outdoor Environment

Our 800-Watt, 4-channel, ultra-compact (1.7" x 4.25" x 8.41") M5-800X4 amplifier features the next level of Element Ready design and performance from Rockford Fosgate, that’s built as rugged as the outdoor environment it’s used in
The IPX6 rated M5 amplifiers provide superior protection and are built to stand up to all the elements including water, dust, mud, and UV rays
The M5 amplifiers are the first series based on new industry standard Dynamic Power ratings, deliver more output where you actually hear it (Dynamic Power Rating: 125 Watts x 4 @ 4Ω OR 200 Watts x 4 @ 2Ω OR 400 Watts x 2 @ 4Ω Bridged/Mono)
Built on the popular Rockford Fosgate Power Marine series, M5 amplifiers also feature the same great technologies like Constant Power, Class-AD and C.L.E.A.N., all engineered, developed, and validated in Tempe, Arizona
Famous Rockford Fosgate build quality with a full 2-year warranty
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on Amazon.com
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Rockford Fosgate

Rockford Fosgate M2-300X4 Marine 300-Watt 4-Channel Element Ready Amplifier

The M2-300X4 full-range 4-channel Element Ready Marine amplifier with 300 Watts RMS is packed with all the power and performance you’ve come to expect from Rockford Fosgate (Dimensions: (1.9" x 6.8" x 10.1")
Class D technology makes this amp extremely efficient by reducing demand on the vehicles electrical system (RMS Power: 50 Watts x 4 @ 4Ω OR 75 Watts x 4 @ 2Ω OR 150 Watts x 2 @ 4Ω Bridged/Mono)
Built for the marine environment, this Element Ready amp features UV resistant protection, conformal coated circuit board, stainless steel mounting hardware and marine grade terminal connections to ensure long lasting outdoor use
Featuring C.L.E.A.N. circuitry to help you adjust your gain settings and a P.O.W.E.R. Supply that generates more power as voltage increases
Famous Rockford Fosgate build quality with a full 2-year warranty
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on Amazon.com
Our #1 Pick Today
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Rockford Fosgate

Rockford Fosgate Power TM400X4ad 400-Watt 4-Channel Marine Amplifier | Class AD, Element Ready: Built to Stand Up to the Marine Environment

Our compact (1.6” x 4.3” x 8.3”) Power Marine TM400X4ad 4-channel amplifier produces more power per square inch than any other model we make with 400 Watts of POWER
Proprietary Constant Power amps are the most powerful on the market, delivering up to 25% more power across all impedance loads (100 Watts x 4 @ 4-Ohm or 100 Watts x 4 @ 2-Ohm or 200 Watts x 2 @ 4-Ohm Bridged)
Built on Rockford Fosgate’s proprietary Class-AD technology and Element Ready protecting against dust, UV, and corrosion, making it perfect for motorsport and marine applications
High-level auto turn-on, CLEAN circuit input/output clip detection, On-board Punch EQ with +18dB boost @ 45Hz and 12dB/octave Butterworth crossover make TM400X4ad an impressive POWER house
Famous Rockford Fosgate build quality ensures that the TM400X4ad will handle everything you throw at it! Full 2-year parts and labor warranty
Details & specs
Check Price
on Amazon.com
Disclaimer: While we make every effort to ensure accuracy, we cannot guarantee that all product specifications, pricing, discounts, and details are complete or error-free. Because information is subject to change, we recommend verifying all details directly with the retailer prior to making a purchase. As an Amazon Associate, we earn from qualifying purchases.

9 Tm400x4ad deals are available from: Amazon, starting from $39.99.

The biggest discount we found is 30% on Rockford Fosgate Power T400X4ad 400 Watt 4-Channel Amplifier | Class-AD with Constant Power (T400X4ad) at Amazon.

The lowest price we found is $39.99 while the highest is $699.99. Prices for the best Tm400x4ad deals average at $362.54.